I use Vdub to convert to lossless AVI. Open the Avisynth script pointing to your d2v in Vdub.

Video--> Compression --> Whatever (I recommend Lagarith lossless codec)

File--> Save as AVI

Before you load the Avisynth script in, you can add a line to the script converting your video to whatever colorspace you want to use in your editor (which is what I would do) and select fast recompress. Alternatively, using full processing mode (which is the default setting) will allow you to use vdub's filters; this will trigger a conversion to RGB.